Why does The temperature and fuel gauges on my 90 b2200 will not read have changed cluster and checked all fuses and wiring?

Answer 1

Question is did you check for continuity when you checked the wiring.There are two ways to do this check.One is use a audible multimeter which you place the positive lead on the sender wire and place the negative to a ground and it should beep.Now if you do not have one hook up a normal test light to the battery positive terminal and touch the end of the (water temperature sender wire end) make sure its NOT on the sending unit and it should light up the test light if the wire connection from the sender to the gauge is connecting a signal.It sounds like you have a bad connection or bad ground and the fuel and water temp ground from there point of origin.Unless the strangest possibility is the ignition switch itself has a bad contact and this is totally possible and not grounding even though the truck runs wiggle the switch to see if any change.The ignition switch WOULD cause the gauges not to register if the contacts on it are worn making poor connections and the truck will still start and run!I bet your key switch is the issue not wiring,fuses,or sending units at this point.Wiggle the key or turn in small increments while its running or key on and see if the gauges move.Best recommend I can make.